diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0c91dae7..42e6b1ec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,13 @@ The published image tags: `latest` follows the most recent release below,
 
 ## Unreleased
 
+**The browser filled your own login into client-secret fields.** Opening Admin → SSO, or a Google,
+Microsoft or integration provider form, could put your mail address in the client ID and your
+password in the secret field, one press of Save away from being stored. An earlier fix told Chrome
+these are not the saved login, but six of the fields also set `autocomplete="off"` of their own,
+which won — and Chrome ignores `off` on a password field. They now send `new-password` as intended,
+and a test reads every form for the same mistake.
+
 **Sign in through Authentik, Keycloak or any other OpenID Connect provider.** Enter the provider's
 issuer, client ID and secret under the new **Admin → SSO** and the login page offers a "Sign in with
 …" button above the password form, which stays; the `OIDC_*` variables do the same for an install
diff --git a/src/Form/AccountType.php b/src/Form/AccountType.php
index 4b8cffb7..6d9db5dd 100644
--- a/src/Form/AccountType.php
+++ b/src/Form/AccountType.php
@@ -67,7 +67,6 @@ class AccountType extends AbstractType
                 'attr' => [
                     'placeholder' => '••••••••',
                     'class' => 'form-input',
-                    'autocomplete' => 'new-password',
                 ] + PasswordManagerIgnore::SECRET,
                 'label' => 'Password',
                 'always_empty' => true,
@@ -149,7 +148,6 @@ class AccountType extends AbstractType
                 'attr' => [
                     'placeholder'  => '••••••••',
                     'class'        => 'form-input',
-                    'autocomplete' => 'new-password',
                 ] + PasswordManagerIgnore::SECRET,
                 'label'        => 'account.form.smtp.password',
                 'always_empty' => true,
diff --git a/src/Form/Admin/OidcConfigType.php b/src/Form/Admin/OidcConfigType.php
index 928041bb..bd493ccb 100644
--- a/src/Form/Admin/OidcConfigType.php
+++ b/src/Form/Admin/OidcConfigType.php
@@ -73,7 +73,6 @@ final class OidcConfigType extends AbstractType
                 'required' => false,
                 'mapped'   => false,
                 'attr'     => [
-                    'autocomplete' => 'off',
                     'placeholder'  => true === $hasSecret ? 'admin.integrations.secret_unchanged' : 'admin.integrations.secret_none',
                 ] + PasswordManagerIgnore::SECRET,
             ]);
diff --git a/src/Form/CalDavConnectType.php b/src/Form/CalDavConnectType.php
index bb74ff74..e5808028 100644
--- a/src/Form/CalDavConnectType.php
+++ b/src/Form/CalDavConnectType.php
@@ -105,7 +105,6 @@ final class CalDavConnectType extends AbstractType
                 'required' => false,
                 'mapped'   => false,
                 'attr'     => [
-                    'autocomplete' => 'off',
                     'placeholder'  => true === $isNew ? '' : 'settings.integrations.field.secret_unchanged',
                 ] + PasswordManagerIgnore::SECRET,
             ]);
diff --git a/src/Form/Integration/IntegrationConnectType.php b/src/Form/Integration/IntegrationConnectType.php
index 062ea207..03b9995a 100644
--- a/src/Form/Integration/IntegrationConnectType.php
+++ b/src/Form/Integration/IntegrationConnectType.php
@@ -69,7 +69,6 @@ final class IntegrationConnectType extends AbstractType
             'required' => $isNew,
             'mapped'   => false,
             'attr'     => [
-                'autocomplete' => 'off',
                 'placeholder'  => $isNew ? '' : 'settings.integrations.field.secret_unchanged',
             ] + PasswordManagerIgnore::SECRET,
         ]);
diff --git a/src/Form/Integration/IntegrationProviderConfigType.php b/src/Form/Integration/IntegrationProviderConfigType.php
index 08743cb8..5fd93790 100644
--- a/src/Form/Integration/IntegrationProviderConfigType.php
+++ b/src/Form/Integration/IntegrationProviderConfigType.php
@@ -69,7 +69,6 @@ final class IntegrationProviderConfigType extends AbstractType
                 'required' => false,
                 'mapped'   => false,
                 'attr'     => [
-                    'autocomplete' => 'off',
                     'placeholder'  => $config instanceof IntegrationProviderConfig && $config->hasClientSecret()
                         ? 'admin.integrations.secret_unchanged'
                         : 'admin.integrations.secret_none',
diff --git a/src/Form/Integration/MailProviderConfigType.php b/src/Form/Integration/MailProviderConfigType.php
index 6a4a3b2c..46cb3247 100644
--- a/src/Form/Integration/MailProviderConfigType.php
+++ b/src/Form/Integration/MailProviderConfigType.php
@@ -45,16 +45,17 @@ final class MailProviderConfigType extends AbstractType
                 'attr'     => ['autocomplete' => 'off'] + PasswordManagerIgnore::ATTR,
             ])
             // Not a password anyone signs in with — it is a value pasted out
-            // of a provider's console. `new-password` invited password managers
-            // to offer generation, and in a wizard that renders one provider at
-            // a time, to fill fields that were not on screen. There is no
-            // standard way to say "this is not a login", hence the vendor hints.
+            // of a provider's console. There is no standard way to say "this is
+            // not a login", hence the vendor hints for the extensions and
+            // `new-password` for the browser, both from PasswordManagerIgnore.
+            // No `autocomplete` of its own here: this array is the left side of
+            // the `+`, so an `off` written in it wins and the browser's opt-out
+            // never reaches the field — which is how it stayed unfixed once.
             ->add('clientSecret', PasswordType::class, [
                 'label'    => 'admin.integrations.field.client_secret',
                 'required' => false,
                 'mapped'   => false,
                 'attr'     => [
-                    'autocomplete' => 'off',
                     'placeholder'  => $config instanceof MailProviderConfig && $config->hasClientSecret()
                         ? 'admin.integrations.secret_unchanged'
                         : 'admin.integrations.secret_none',
@@ -87,7 +88,6 @@ final class MailProviderConfigType extends AbstractType
                     'mapped'   => false,
                     'help'     => 'admin.integrations.field.push_token_help',
                     'attr'     => [
-                        'autocomplete' => 'off',
                         'placeholder'  => $config instanceof MailProviderConfig && null !== $config->pushVerificationToken
                             ? 'admin.integrations.secret_unchanged'
                             : 'admin.integrations.secret_none',
diff --git a/tests/Form/PasswordManagerIgnoreTest.php b/tests/Form/PasswordManagerIgnoreTest.php
index 59145d5d..37741993 100644
--- a/tests/Form/PasswordManagerIgnoreTest.php
+++ b/tests/Form/PasswordManagerIgnoreTest.php
@@ -4,6 +4,8 @@ declare(strict_types=1);
 
 namespace App\Tests\Form;
 
+use App\Entity\Oidc\OidcConfig;
+use App\Form\Admin\OidcConfigType;
 use App\Form\Setup\FirstAdminType;
 use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
 use Symfony\Component\Form\Extension\Core\Type\FormType;
@@ -102,6 +104,62 @@ final class PasswordManagerIgnoreTest extends KernelTestCase
         self::assertStringContainsString('data-form-type', $html);
     }
 
+    /**
+     * A secret field has to reach the browser as `new-password`.
+     *
+     * PasswordManagerIgnore::SECRET carries it, and six credential fields
+     * never sent it: each wrote `'autocomplete' => 'off'` in the array it
+     * unioned SECRET onto, and with `+` the left side wins. Chrome ignores
+     * `off` on a password field, so Admin → SSO took the administrator's own
+     * mail address as its client ID and their password as its client secret —
+     * the very autofill the constant was introduced to stop, in every form but
+     * the one it was reported from.
+     *
+     * Read from the source rather than rendered form by form: the mistake is in
+     * how the array is written, and a new form can make it without appearing
+     * in any list a test keeps.
+     */
+    public function testNoSecretFieldOverridesTheBrowsersOptOut(): void
+    {
+        $offenders = [];
+
+        foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator(\dirname(__DIR__, 2) . '/src/Form')) as $file) {
+            if (false === $file->isFile() || 'php' !== $file->getExtension()) {
+                continue;
+            }
+
+            $source = (string) file_get_contents($file->getPathname());
+
+            // Every array literal that is the left side of `+ SECRET`.
+            preg_match_all('/\[(?:[^\[\]]|\[[^\[\]]*\])*\]\s*\+\s*PasswordManagerIgnore::SECRET/', $source, $matches);
+
+            foreach ($matches[0] as $literal) {
+                if (1 === preg_match("/'autocomplete'\s*=>/", $literal)) {
+                    $offenders[] = $file->getFilename();
+                }
+            }
+        }
+
+        self::assertSame([], $offenders, 'These forms set their own `autocomplete` on a field that takes PasswordManagerIgnore::SECRET; theirs wins and the browser fills in the saved login.');
+    }
+
+    public function testTheSingleSignOnSecretIsNotOfferedTheSavedLogin(): void
+    {
+        self::bootKernel();
+
+        $container = self::getContainer();
+
+        $form = $container->get(FormFactoryInterface::class)
+            ->create(OidcConfigType::class, new OidcConfig(), ['csrf_protection' => false])
+            ->createView();
+
+        $html = $container->get(Environment::class)
+            ->createTemplate('{{ form_widget(field) }}')
+            ->render(['field' => $form['clientSecret']]);
+
+        self::assertStringContainsString('autocomplete="new-password"', $html);
+    }
+
     private static function renderField(string $field): string
     {
         $container = self::getContainer();